Conceptual design of the muonium-to-antimuonium conversion experiment (MACE)

The spontaneous conversion of muonium to antimuonium is an interesting charged lepton flavor violation phenomenon that offers a sensitive probe for potential new physics and serves as a tool to constrain the parameter space beyond the Standard Model. The Muonium-to-Antimuonium Conversion Experiment (MACE) was designed to utilize a high-intensity muon beam, a Michel electron magnetic spectrometer, a positron transport system, and a positron detection system to either discover or constrain this rare process with a conversion probability of $$\mathcal {O}(10^{-13})$$ . This article presents an overview of the theoretical framework and a detailed description of the experimental design for muonium-to-antimuonium conversion.

Keywords:

Muonium

Lepton flavor violation

Muon beam

Drift chamber

Microchannel plate

Electromagnetic calorimeter

Conceptual design of the muonium-to-antimuonium conversion experiment (MACE)

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